Electrically-controlled transmission



M. TAIGMANL ELECTRICALLY CONTROLLED TRANSMISSION.

APPLICATION FILED M'AY n. 1918- Patented May 17, 1921.

Ill

iii:

- viAx TAIGMAN, or new roan, N. Y. j

. ELEcTRIcALLY-coiv'rnonnnn" TRANSMiSSiON.

newsman.

Specificationiof Letters Patent.

- Application filed May 17, 1918.] Serial a -235,221.

To all whom it may concern:

cludes a friction driving clutch a control- Be it known that 1, MAX TAIGMAN, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements 1n Electri- 'cally-(lontrolled Transmission, of which the followingis aspecification. v

The lnventlon relctes to an attachment which can be arranged selectively to con stitute an electrically actuated power plant for driving a single machine, or to constitute a control for anyone of aseries of machines driven from a common power source,

and this application constitutes another em-v bochment of the invention disclosed in my co-pending application,

entitled Electrically controlled transmission, filed under even date. I v p, In factories where a large number of sewing machines and the like are used, it is economical to drive a large number of machines from a single line shaft during the busy season, but during the slack season it is ,de' sirable to run the few necessary machines separately by individual motors. Accordingly, the invention has for an object the provision of a simpleattachment which can be added to the usual power table of a sewing machine to supply power to a control for a single'machine, or which with the individual motor sewing machine can be used as a controlfor coupling any one of the machines in the.

' tachment to a conve plant with the general line shaft. 1

' The invention contemplates in its details an arrangement including a driving '-,con--;

nection with the motor, which connection in;

for the motor and a single foot-actuated control for simultaneously moving the; clutch into operative position and completing the] circuit through the motor.

Another object of the invention Pia,

vide an organization of'parts such as described', which can be mountedi'in anyposr tion adjacent the machine to be driven and which can beoperatively "connected thereto to the line shafting.

Another objectof the invention 1s to provide a simple form of circuit controlling switch which will-withstand the wear and; tear and the jars thereon incidental to the rapid actuationof the same when used in connection with the drivmg of sewing ma- Serial No. 235,220,.

device shown in Fig. 1;

disconnected from the rod, designed tol'be by a belting connected either to a motor or Y just-ment in, a base I driven by the device, adjacent such Patente idMay 1%,.1921t cn esoi S i ar devices: a which the" periods. of mterruptions rapidly succeed 5 1 each other-and areof short-time duration.

A further object ofthe invention is, to

provide "in: the, organization above outlined, a slmple form-of brake which will'p'romptl'y 5 and quickly stop theactuation of the-driven.

parts when disconnected fromfqthe freel yr'evolving motor element.

' Various other objects and advantages; of

the invention willbe in' part obvious from iv certainnewand novel features of construe.-

tion and combination of partshereinafterfl; set forth and claimed. I j, V Referring to. the accompanying draw- Figure .1 is a'view in side'elevation ofa device SllOWlIlg a preferredembodiment of my invention mounted on its own supporting-stand;

Fig. 2 1s a view, in front elevation of the Fig. 3 element is an enlar ed looking at the same from the'right hand side of Fig. 2;

Fig. 4: is a vertical,v sectional view. taken On theline 44-of Fig. 3; Fig. showing another methodof "affixing" the at- In the following descriptionzand the 5. is a detail vlew 1n-- siderelevation" view of the iswitch I I g ntionalformnofsewing v 6 and 7 are details inplan 'respecclaims, parts will be identified'by specific names for convenience of expression, but

they are intended to be; as. generic in their;

a p t n-tosimilar parts asgtheiiart n permit;

In, the accompanying drawings, andr re- -ferringiparticularly to Figsal and-:2, there is shown a support 10 in the form of a solid I mounted for verticaladmember 12* which may be fixed respectively such as-a part of the frame-of the maohlnej or may be'positioned membenlland a top i frame?) The, rod 10'1S'Pr0 vided adjacent its lower portion with a bracket- 13 upon which is mounted a motor '14:. The support is also provided with a driven from the motor by laterally extending bracket, 15in the form 17 is loosely mounted upon the shaft 16 and includes a driving'member 18 which is provided with a pulley 19 connectedv to be means of belting 20. The coacting driven member 21 of the clutch is provided with .a pulley 22 designed I v tQbe connectedby belting 23; with the machine designed vtobe The driven member of the clutch elements.

driven by the motor. 22 is also provided with a hollow brake. disk 24, which has a relatively large'external diameter so as to position a broad bearing surface to the outside The' hub of the member 22 is provided withan extension 25 projecting beyond the free end of the shaft '16 and is provided at Y its outer end with aireely rotatable ballbearing .26.. A, bell-crank lever 27 is ful- I 1 crumed tothebracket 15 by means of .a set screw 28. The lever includes a horizontally extendingcarm 29 underlapping the brake pression spring '31 into disk 24; and projecting over-the controlling foot pedal (not shown) usual with'such machines. The arm 29 is provided. witha brake member 30 designed to be forced by a comgagement' with the brake band to hold the I same normally against'rotation. The free end of the arm 29 is provided with a reach rod 32 designed to extend to the foot pedal where the device is designed-to be controlled by a foot movement of the operator, or to I any suitable actuating handle.

demountably positioned on the bracket 15.

The switch includes a supporting plate 36 provided on'its rear face with terminal 1 sockets 37 designedto receive a plug connection with a source of electric energy and provided with a snap switch 27 for manually controlling the circuit through the control switch, The control switch includes a relatively stationary contact member 38 and a relatively, movable contact member 39 The member {39 is in the form of a lever fulcrumed intermediate its end on a pivot pin 40 and provided atone end with a housed spring 41 mounted inarecess in the plate 36 and bearingv upon the opposite end of the lever 39 so'as to maintain the contacts normally in circuit closingposition.

For the purpose of resiliently mounting the relatively fixed contact '38. this contact is mounted upon a strip 42 ofresilient metal,

of an upwardly curved armin which is sup ported one end of a deadshaft .16. A clutch firm clutching en- .men't 25 will thus be the machine.

one end of which isfastened to the binding post 43 and the otherend of which is disposed ina hollowed recess 44 in thesupport 36. The free end 45 of the strip 4.2 bears against the side of this recess, and this causes the strip to act as a spring bridge. The support 36 is provided with aplnnger 46, one end of which is designed to bear on the enlarged head 4701? the lever 39, andthe other end of which is adapted to be engaged by the head 3a of the lever arm 33, so as to maintain the movable contact in open-position as shown in Fig. t when the control lever 37 is in its breaking position as shown in Fig. 2.

In the deviceas thus'described'the attach ment has been considered as providing its own support, but it is to be understood that the bracket 13 may be in the form of a twopart arm 48, as shown in Figs. 5 and 7, the parts of. which can beattached by means of a bolt 49 to the upright 50 of a conventional form of power table." Also the bracket 15 may be separate fromthe'rod 10, "and may be in theform ofan arm 51 provided with an apertured flange 52 for attaching the same to the upright 50. This construction is particularly desirable where it is desired to omit the separate motor and drive the pulley 19 from a line shaft. I

In operation and assuming that the parts are in position as shown in Fig. 2 and with the motor 14 in position to supply the power, rod 32 is lowered in order to start the machine. This movement will act through the control lever to lower the brake member 30 from its engagement with the brake band and at the same time to move the head 34 to" V the left-of the position shown'in Fig. 2 and" into engagement with the bearing 26. V The shiftable element of the friction clutch elemoved into binding engagement with the driven member 18. .At the same time the pressure onthe plunger 46 will be released, thus permitting the spring/l1 to acton the control lever 39 and complete the electric circuit through the switch to actuate the motor. Powerwill thus be conveyed from the motor through the clutch to the machine. Releasing pressure on the rod 32 will permit the parts of the clutch to kick themselves apart and the spring 31 will reset the'brake, and thus stop An attachment of this character islpar ticularly. applicable to a factory inwhich a battery of machines are actuated from asingle line shaft. In this case the belt20j is connected to the shaft rather thanto the motor and the part of this device which in cludes the clutch control together with its coacting brake, is utilized without making use of the illustrated motor or its circuit closing switch. In the slack season when but a few machines are in operation the belt what I 1. In a device of the class described, the

combination of a support including a motor supporting bracket, a motor carried thereby,

a second bracket positioned above the motor, a dead-shaft fixed in said second bracket against rotation, a clutch loosely mounted on said dead shaft and including a driving member operatively connected to the motor to be driven thereby and a coacting driven member provided with means for connecting the same to drive a machine, said driven member provided with a brake disk, a single manually actuated lever provided with a brake member adapted to engage the brake disk to force the driven member in a direction transversely of its axis of rotation and into bearing engagement with. the dead shaft, a normally closed switch for controlling the motor oppositely disposed to the clutch, said lever provided with an arm dis-s posed between the clutch and switch acting in one direction for engaging the driven clutch member nally along the dead shaft and into clutching engagement with the driving member and acting in the opposite direction on said switch to move the same into an open position and thusintercept the current supply to move the same longitudito the motor simultaneously with the brak-v ing of the driven clutch member.

2. An attachment for a 'motor driven clutch comprising a bellcrank lever pivoted at its'angle with one arm extending'hori zontally and constituting an actuating arm and the other'arm extending vertically and constituting a clutch controlling member, a clutch on one side of said member, a switch on the other side, a spring for moving the switch intocircuit closing position, and a t for holdingsaid switch in circuit breaking position and against the action of said spring. j p 1 I 3. An article of manufacture constituting plunger controlled by the clutch controlling p i 7 .member an attachment for a motor driven clutch mechanismcomprlsing a support, a clutch carried by the support and including a movable. element, a switch comprising a relatively fixed'contact member carried by said support" and a movable contact member co acting with the fixed contactmembena 'resilient mounting for the fixed contact memmeans acting. on the movable contact her 3 l r. member for movlng the same into circuit closing engagement with the resiliently mounted fixed contact member, a plunger carried by the support in axial alinement with said movable element, and a clutch controlling member acting in one direction through said plunger to hold the movable memberin spacedrelation to the resiliently mounted "fixed member and in the other direction to shlft said movable element.

f Signedat New York in the county of New 'York and State of New-Yorkthis filth of May, A. D. 1918. i 1

" AX TAIGMAN. 

